52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// UNSUPPORTED: libcpp-has-no-threads
|
|
// UNSUPPORTED: c++98, c++03
|
|
|
|
// <future>
|
|
|
|
// class packaged_task<R(ArgTypes...)>
|
|
|
|
// void swap(packaged_task& other);
|
|
|
|
#include <future>
|
|
#include <cassert>
|
|
|
|
class A
|
|
{
|
|
long data_;
|
|
|
|
public:
|
|
explicit A(long i) : data_(i) {}
|
|
|
|
long operator()(long i, long j) const {return data_ + i + j;}
|
|
};
|
|
|
|
int main()
|
|
{
|
|
{
|
|
std::packaged_task<double(int, char)> p0(A(5));
|
|
std::packaged_task<double(int, char)> p;
|
|
p.swap(p0);
|
|
assert(!p0.valid());
|
|
assert(p.valid());
|
|
std::future<double> f = p.get_future();
|
|
p(3, 'a');
|
|
assert(f.get() == 105.0);
|
|
}
|
|
{
|
|
std::packaged_task<double(int, char)> p0;
|
|
std::packaged_task<double(int, char)> p;
|
|
p.swap(p0);
|
|
assert(!p0.valid());
|
|
assert(!p.valid());
|
|
}
|
|
}
|